TransferFunctionWidget.h

#pragma once

#include <QWidget>
#include <QPainter>
#include <QMouseEvent>
#include <QPointF>

#include <QVector>
#include "TPoint.h"
#include "TransferPoints.h"

#define ELEMENTS_PER_COLOR 4
#define COLORS_IN_TRANSFER_ARRAY 4096

class TransferFunctionWidget : public QWidget
{
        Q_OBJECT

public:
        TransferFunctionWidget(QWidget* parent = 0);
        ~TransferFunctionWidget();


        void paintEvent( QPaintEvent* e);
        const QVector<TPoint>& points() const;
        TransferPoints* transferPoints() const {return m_transferPoints;}

        void saveTransferPoints(QString fileName);
        void rebuildTransferFunctionTexture();
        void setTranferFunktionApplied(bool apply);
        float* getTransferTextureData() const;
        void setHistogram(double* histogram, int size);
        void SetMode(int mode);

public slots:
        void pointsUpdated(int);
        void initTransferPoints(QString name, int mode);

signals:
        void changeColor(QColor color);
        void transferFunctionChanged(float* data, int size, int type);
        void ColorgradientChanged(float* data, int size, int type);
        void histogramLoaded(double* histogram, int size);

public:
        TransferPoints* m_transferPoints;

        void DrawRectangle(float* tex, int i);

private:        
        bool tranferFunktionApplied;
        float* transferFunctionTextureData;
        float* transferFunctionTextureData2D;

        int m_type;
};